Fluids 2 Documents

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Compressible Fluids Notes
12.Oblique Shock Waves
Recall that we can make any shock wave steady by transforming into its
reference frame. Now, consider if we transform into a reference frame moving
perpendicular to the normal shock (i.e., moving up or down

MECH 430
2
Problem 1. 20 points.
You push the plunger into a syringe lled with air ( = 1.4, R = 287 J/(kg K) at an initial pressure
and temperature of 1 atm and 300 K. The velocity of the plunger is a constant 100 m/s.
(a) Find the velocity of the shock w

MECH 430
2
Problem 1. 20 points.
A converging-diverging nozzle operates from an air ( = 1.4) reservoir with a stagnation pressure of
100 kPa. It was experimentally found that, with a back pressure of 67.7 kPa, a normal shock appears
in the diverging part

Introduction
The purpose of this ﬁlm is to demonstrate several
effects of compressibility which are important in any
attempt to produce or control a supersonic internal
ﬂow. The heart of the subject is the behavior of a com-
pressible gas ﬂowing at high s

Compressible Fluids Notes
10.Frictional Flow
Friction, of course, is present in all fluid flow.* In developing isentropic flow,
we assumed that the friction effects are small, or are confined to a thin layer
near the wall (i.e., the boundary layer) outsid

Compressible Fluids Notes
1. Introduction
flows refer to the aerodynamic flow over a wing or body. Internal flows refer
to flows that pass through a device, such as jet engine or a rocket. So, our list
of applications begins with:
Compressible Fluid Dynam

Compressible Fluids Notes
6. Applications of Isentropic Flow
If the exit flow is subsonic, then the exit pressure must match the back
pressure: pexit = pback. This is because, in subsonic flow, information can be
communicated upstream and the flow will ad